Ionia Weather Forecast
- 67
- 77
Rain Showers
- 51
- 74
Partly Sunny
- 54
- 70
Mostly Sunny
- 65
- 80
Partly Sunny
- 58
- 78
Slight Chance Thunderstorms
- 62
- 74
Partly Sunny
- 61
- 82
Chance Rain Showers
Today 9 Sep Ontario
Showers likely Early, then Showers with a chance of Thunderstorms late. Highs Ranging from the mid 70s on the Hilltops to the upper 70s across the lower Elevations. Southwest Winds 5 to 10 Mph. Chance of rain 80 percent.
Tonight 9 Sep Ontario
Showers with a chance of Thunderstorms this Evening, then a chance of Showers after midnight. Warm with Lows in the upper 60s. Southwest Winds 5 to 10 Mph, becoming west. Chance of rain 80 percent.
Ionia Temperature Statistics
September Temperature
Rochester, Greater Rochester International Airport (15.5 miles)
Lowest 7 September, 2026
50 °FAverage September
70 °FHighest 2 September, 2026
85.6 °F
Climate (2021–2026)
Rochester, Greater Rochester International Airport (15.5 miles)
Average Low 2021–2026
42.2 °FAverage 2021–2026
50.8 °FAverage High 2021–2026
59.5 °F